The middle of the next month will see The Joker and Harley Quinn added to LEGO Batman: Legacy of the Dark Knight as playable characters. They will be part of a new DLC add-on featuring a new story mission, Mayhem mode, and new costumes, as noted in past reveals.
This new Mayhem Collection DLC arrives on September 18th, for the Deluxe Edition’s owners. A new, Absolute, difficulty will also be added into the game.
Lastly, take note of the fact that the Nintendo Switch 2 version of the game will launch the same day.